Bob. You got to walk before you can run. Unless you plan on loading many hundreds of rounds, I see no need for a progressive press. Any good single stage press will be more than adequate for your needs.
I still use my old Rockchucker press for handgun ammo, and load several thousand a month. Of course, I am retired and have all the time in the world.
I also cast all my lead bullets, including those for two 45-70 rifles. (a Marlin and a Ruger #1)
I'm not sure from your post if you are using a reloading press, ot those Lee hammer them in, and hammer them out dies. They sure are slow, but have their place. (I can see the flames now.)
Anyway, I hope I have helped you out some. BTW, those 45-70 kick like hell with the hotter loads. My Marlin is one of the first "New" models with the curved buttplate.
No recoil pad, and a couple of boxes of the hotter loads will leave an impression off the bench. Let me know how you come out.
Paul B.